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        <title>OpenLayers Filter Strategy Example</title>
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        <h1 id="title">Filter Strategy</h1>
        <div id="tags">
            filter, strategy, strategies, kml, advanced
        </div>
        <p id="shortdesc">
            Demonstrates the filter strategy for limiting features passed to the layer.
        </p>
        <div id="map" class="smallmap"></div>
        <label for="span">time span (seconds)</label>
        <select id="span" name="span">
            <option value="15">15</option>
            <option value="30">30</option>
            <option value="60" selected>60</option>
            <option value="120">120</option>
            <option value="240">240</option>
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            <p>
                This example uses a filter strategy to limit the features that are passed
                to a layer.  Features bound for this layer have a <code>when</code> attribute
                with date values.  A filter strategy is constructed with a between filter
                that limits the span of dates shown.  A simple animation cycles through
                the domain of the <code>when</code> values, calling <code>setFilter</code>
                on the strategy with an updated filter.
            </p><p>
                View the <a href="filter-strategy.js" target="_blank">filter-strategy.js</a>
                source to see how this is done
            </p>
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        <script src="filter-strategy.js"></script>
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